42results about How to "Low shot content" patented technology

The invention relates to the technical field of thermal insulation materials. The invention provides a high-temperature-resistant thermal insulation material and a preparation method thereof. The high-temperature-resistant thermal insulation material comprises the following raw materials in parts by weight: 55-75 parts of ceramic fiber cotton, 5-15 parts of potassium hexatitanate whiskers, 4-8 parts of modified expanded vermiculite, 5-18 parts of zirconium dioxide aerogel, 1-6 parts of a silane coupling agent, 2-5 parts of an inorganic binding agent, 1-3 parts of an organic binding agent, 1-5parts of a flocculating agent and 2-4 parts of a dispersing agent. The problems that in the prior art, a heat preservation and insulation material made of single ceramic fiber difficultly meets the requirement for high-temperature heat insulation, and the comprehensive performance of the ceramic fiber heat insulation material needs to be further improved are solved.

The invention discloses a non-asbestos high-density temperature and wear resisting heat insulation plate. The heat insulation plate is characterized by comprising, by weight, 200-260 parts of kaolin, 15-40 parts of alumina powder, 200-260 parts of aluminum silicate refractory fiber, 10-20 parts of dry paper pulp, 5-15 parts of glass fiber, 10-20 parts of cationic starch, 1-1.5 parts of polyvinyl alcohol and 1-1.5 parts of high-elastic emulsion. The non-asbestos high-density temperature and wear resisting heat insulation plate completely has no asbestos, eliminates environment risks brought by asbestos fiber in the production, maintenance and cleaning processes, is environmentally friendly and has the advantages of resisting high temperature, high pressure, bending and wear, being high in density and good in tenacity and the like. The high temperature lower than or equal to 1200 DEG C can be resisted, and the density reaches up to 900-1100 kg / m<3>. The tenacity is good, and the compression ratio can reach 1:1.4. The shot content in the non-asbestos high-density temperature and wear resisting heat insulation plate is low, and it is ensured that products making contact with the heat insulation plate are not damaged in the using process.

The invention discloses a production method for preparing an external wall fireproof thermal-insulation plate by using slag cotton. The production method comprises: (1) slag cotton raw material preparation, wherein blast furnace slag, graystone, fly ash, magnesium oxide, calcium oxide and wollastonite are mixed and melt into a liquid mixture; (2) fiber preparation, wherein the liquid mixture continuously flows into a centrifugal roller rotating at a high speed, and condenses into filamentous fibers under the centrifugal throwing and air cooling effect, and the fibers are subjected to collecting molding under the air blasting effect of an air blower; (3) thermal-insulation material raw material preparation, wherein 50-65% of the prepared slag cotton, 3-6% of polycrystalline zirconia fibers, 15-20% of desulfurized gypsum, 10-15% of fly ash, and 10-15% of 425# cement are adopted; (4) wet molding plate preparation; and (5) finished product preparation.

The invention belongs to the field of refractory fibers and particularly relates to a centrifugal spinning preparation method for an environment-friendly CMSP refractory fiber blanket. An alkali-free boron-free CMSP refractory fiber is produced from natural diopside, quartz sand, calcite, flint clay and phosphate ore which are subjected to iron removal treatment as raw materials by virtue of a centrifugal spinning method and has the characteristics of high refractoriness, high degradation rate in the lung fluid, energy conservation and environment friendliness. The refractory fiber has the advantages of natural and easily available raw materials, low cost, environment friendliness during the manufacturing process and no air pollution phenomenon; the product has good solubility in body fluids and refractoriness not less than 1000 DEG C and is an ideal environment-friendly energy-saving alternative, meets the thermal-insulation requirements of most pipes and devices and has wide market prospects and the risk of occupational health of workers is eliminated.

The invention discloses a production system and a production method of micro fiber glass wool. The production system comprises a melting kiln, a fuel gas source, a first air blower, a wiredrawing leaking plate, a wool blowing device, a second air blower, a wool collecting device and a controller. The production method comprises the following steps: (1) performing heating melting; (2) performing wiredrawing; and (3) performing wool blowing. The production system and the production method have the beneficial effects of being simple in structure and easy to achieve, in addition, an automatic control function is achieved, the stability of the beating degree of the glass wool can be ensured, and furthermore, quality stability of the produced glass wool can be ensured; stability of pressure of ejected flame air flow can be ensured, furthermore, the shot content in the product, namely the glass wool, is reduced, and the quality of the glass wool can be improved; the use amount of a fuel gas can be reduced, electric energy consumption can be reduced, and the production cost can be lowered.

The invention discloses a mineral compound fiber wet-method slag removal device. The mineral compound fiber wet-method slag removal device comprises an electric melting furnace, the electric melting furnace is connected with a debonding machine, the output end of the debonding machine is connected with softening pools and air floated equipment, wherein the softening pools and the air floated equipment are arranged alternatively, seven softening pools are arranged, and six pieces of air floated equipment are arranged; the softening pool at the most tail end is connected with slag separators, and the two ends of the slag separators are provided with two-phase pulp fluid pumps; two slag separators are arranged to process long fiber and short fiber correspondingly; and the slag separators are then connected with automatic dewatering equipment, fiber dewatering machines, flat belt conveyors, drying machines, cyclone dust collectors and centrifugal fans in sequence. By means of the mineral compound fiber wet-method slag removal device, the problems that existing mineral fiber is poor in tenacity, high in slag ball content, not environmentally friendly, low in production efficiency and not suitable for industrialized production are solved, and no dust is generated in the production process.

The present invention relates to a method of making mounting mats for use in pollution control device. The method comprises the steps of: (i) supplying inorganic fibers through an inlet of a forming box having an open bottom positioned over a forming wire to form a mat of fibers on the forming wire, the forming box having a plurality of fiber separating rollers provided in at least one row in the housing between the inlet and housing bottom for breaking apart clumps of fibers and an endless belt screen; (ii) capturing clumps of fibers on a lower run of the endless belt beneath fiber separating rollers and above the forming wire; (iii) conveying captured clumps of fibers on the endless belt above fiber separating rollers to enable captured clumps to release from the belt and to contact and be broken apart by the rollers; (iv) transporting the mat of fibers out of the forming box by the forming wire; and (v) compressing the mat of fibers and restraining the mat of fibers in its compressed state thereby obtaining a mounting mat having a desired thickness suitable for mounting a pollution control element in the housing of a catalytic converter.

The invention discloses a production of centrifugal ultra-filament mineral cotton which is excellent in index and relatively long in cellosilk. The production method comprises the following steps: (1) preparing raw materials, namely fusing 55-65% of blast furnace slag, 12-18% of graystone, 5-7% of coal ash, 2-3% of magnesium oxide, 2% of calcium oxide and 15-20% of wollastonite in percentage by weight into a liquid mixture; and (2) preparing fibers, namely continuously enabling the liquid mixture to flow to a centrifugal roll which rotates at a high speed, coagulating the liquid mixture into filamentous cellosilk under the action of centrifugal throwing and air cooling, and collecting and forming the cellosilk under the blasting action of a blast blower.

The invention discloses an environment-friendly inorganic fiber heat insulation felt and a preparation method thereof. The environment-friendly inorganic fiber heat insulation felt comprises a heat insulation inner layer and a heat insulation outer layer, wherein the heat insulation outer layer is formed on the heat insulation inner layer; the heat insulation outer layer is made of an inorganic fiber cloth, and an inorganic fiber heat insulation cotton; the heat insulation inner layer and the heat insulation outer layer are adhered by an adhesive. The preparation method of the environment-friendly inorganic fiber heat insulation felt comprises the following steps of uniformly coating a sodium silicate adhesive onto the surface of the heat insulation outer layer, and covering the heat insulation inner layer at one side, coated with the adhesive, of the heat insulation outer layer; pressing and forming, cooling, and cutting, so as to obtain the environment-friendly inorganic fiber heat insulation felt. The environment-friendly inorganic fiber heat insulation felt has the advantages that the fluffy structure is formed, so that the heat insulation property is better; the thickness is small, the weight is light, the tensile strength is strong in the weft and warp directions, the fireproof property is realized, and the service life is long; the surface is smooth and flat, the easiness in contamination is avoided, the dissolvability is realized, and the pollution to environment is avoided.

The invention discloses a production system and a production method of microfiber glass wool. The production system includes a melting kiln, a fuel gas source, a first blower, a wire drawing bushing, a cotton blowing device, a second blower, a cotton receiving device and The controller; the production method comprises the following steps: (1) heating and melting; (2) wire drawing; (3) blowing cotton. Beneficial effects: the present invention has a simple structure, is easy to implement, and realizes the automatic control function, which ensures the stability of the glass wool beating degree, thereby ensuring the stable quality of the produced glass wool; and ensuring the stable pressure of the flame air flow blown out by it. , thereby reducing the content of slag balls in the product glass wool, improving the quality of glass wool; reducing the use of fuel gas, reducing power consumption, and reducing production costs.

The invention discloses a pure oxygen combustion system for rock wool melt temperature multi-point accuracy control, and solves the technical problems that in the conventional rock wool production process, the melting strength of a product is insufficient, the acidity coefficient is high, and the melt is cooled through chute combining. The pure oxygen combustion system is characterized in that natural gas is used as fuel; oxygen is adopted as a combustion-supporting medium; rock wool melt is heated through combustion of pure oxygen combustion guns; the particular positions, acting on the rock wool melt, of the pure oxygen combustion guns are the top part of a siphonal opening, the lower part of a No. 1 movable chute and the lower part of a No. 2 movable chute; the real-time multi-point accuracy control of natural gas or oxygen flow rate is realized through real-time on-line measurement of the multi-point temperatures of the rock wool melt, so that the process temperature needed by the rock wool melt can be accurately controlled. According to the pure oxygen combustion system, stable production of rock wool product with high acidity coefficient can be realized, the fiber forming rate of rock wool melt can be increased, energy consumption in rock wool melt melting process can be effectively lowered, and the shot content of the product can be reduced.

The invention discloses an inorganic fiber with coal ash as a main raw material and a manufacturing method of the inorganic fiber. A residue obtained after the inorganic fiber taking the coal ash as the main raw material is fired at the temperature of 550 DEG C for 30min contains the following components in percentage by weight: 39.0-48.0% of SiO2, 10.0-20.0% of Al2O3, 20.0-28.0% of CaO, 2.5-10.5% of Fe2O3, 3.5-10.5% of MgO, 0.2-2% of Na2O, 0.2-2.0% of K2O and 0.2-2.5% of TiO2. The inorganic fiber disclosed by the invention has favorable water resistance and durability, a relatively high acidity coefficient, relatively low shot content, a relatively small fiber diameter, very high tensile strength and a relatively low heat conductivity coefficient, can be used as a sound absorption material, a thermal insulation material and the like and can be used for completely replacing a rock wool board thermal insulation material made of a basalt fiber in the prior art.

The invention relates to a preparation method for a lanthanum zirconate ceramic fiber blanket. The method uses lanthanum zirconate as the zirconium source, and lanthanum nitrate and lanthanum chloride and corresponding hydrate thereof as the lanthanum source, prepares precursor sol according to the molar ratio of La<3+>:Zr<4+> = 1:(0.87-1.15), and obtains gelatinous fiber through centrifugal fiber formation technology after aging; the gelatinous fiber is made into a gelatinous fiber blanket through cotton collecting and blanket forming; the La2Xr2O7 ceramic fiber blanket of pyrochlore type is obtained after calcination. The La2Xr2O7 ceramic fiber blanket of pyrochlore type, prepared by the invention, has a flat surface, is low in shot content, good in resilience, has a heat conductivity coefficient of 0.037-0.056W / (m*K), and has an excellent heat-insulating property; the method reduces the calcination temperature, and is simple in structure, controllable in technology, and suitable for large-scale production of the lanthanum zirconate ceramic fiber blanket.

The invention discloses a production process of an environmentally friendly rock wool insulation board. Preheating is carried out after mixing and crushing raw materials, and then the temperature in the cupola is maintained, and liquid oxygen is added when the raw materials are melted and burned, so that the production does not require too high heating temperature , reduces production requirements, saves energy, and has a reasonable ratio to ensure that the obtained molten raw material liquid has a uniform composition. Reduce the generation of slag balls; the production process uses raw material crushing equipment for raw material crushing, cutting and crushing the mixture through high-speed rotating crushing rollers, and screening the powder with small particle size through the sieving plate to discharge, so that the obtained mixed raw materials have high uniformity and mixing The effect is good, which reduces the difficulty of the subsequent heating and melting and material fiberization process, further makes it easy to reach the production temperature of the environmental protection rock wool insulation board, and reduces the content of slag balls in the environmental protection rock wool insulation board.

The invention belongs to the technical field of refractory materials, and in particular relates to an alumina fiber blanket and a preparation method thereof. The preparation method provided by the present invention comprises the following steps: a) mixing and heating polyaluminum chloride sol, silica sol and spinning aids for reaction to obtain spinning dope; the spinning aids include lactic acid, polyvinyl alcohol and alcohol; b) The spinning stock solution is fiber-formed in a spinning machine, and the obtained fiber filaments are collected to obtain a precursor fiber blank; the distance between two adjacent rows of orifice plates in the spinning machine is ≥ 5 mm, and the same row of orifice plates The distance between the spinning holes on the upper surface is ≥ 2.5mm; c) Needling the precursor fiber blank to obtain the precursor fiber blanket; d) Carrying out the precursor fiber blanket in the low temperature zone, medium temperature zone and high temperature zone of the heating furnace in sequence Heat treatment to obtain alumina fiber blanket. The alumina fiber blanket prepared by the method of the invention has high integrity and low slag content, and is suitable for use as a surface protection material for ceramic fiber module furnace linings.

The invention relates to a slag-free aluminum silicate cotton wool and its application in the braking field. Contains ordinary type, zirconium-containing type and soluble aluminum silicate fiber lint, the fiber length is 50-300μm±30, the diameter is 2-5μm, the slag content of φ≥0.25mm is 0-8%, and the Mohs hardness is 5-7 , use temperature 1000~1300℃, thermal conductivity W / mk, 500±20℃≤0.153, tensile strength 1000~1600Mpa; chemical composition is Al2O343~55%, SiO245~57%; or Al2O3+SiO2+ZrO298.5~ 99.5%, of which, ZrO2≥15%, impurity balance; or SiO2 52~85%, CaO 5~35%, MgO 1~10%, Al2O30~1%, B2O31~2%; used as fiber reinforcement in the braking field material application.

The invention relates to the technical field of thermal insulation materials, and specifically discloses an inorganic fiber thermal insulation board as well as its preparation method and application. The inorganic fiber insulation board includes the following components: 15-30 parts of metallurgical slag, 20-50 parts of coal gangue, 10-30 parts of elutriated Longyan soil, 30-60 parts of alumina, 30-50 parts of silicon oxide, and talcum powder 5‑10 parts and Fluorite 3‑5 parts. The inorganic fiber insulation board provided by the present invention makes full use of solid waste and realizes the resource utilization of solid waste. At an average temperature of 500°C, the thermal conductivity is 0.03-0.04w / (m.k) (average temperature 500°C), hydrophobic The rate is 99.3% to 99.5%, and the volume water absorption rate is 1.2% to 1.8%. It can be widely used in the insulation of marine cabins, and can achieve good thermal insulation, heat insulation, and moisture-proof effects. The raw materials are cheap and easy to obtain, and have a wide range of applications. Application prospect.

The invention discloses a production method of centrifugal super-filament slag cotton with excellent index and long fiber: (1) raw material preparation: blast furnace slag, basalt, fly ash, magnesium oxide, calcium oxide, silica fume (2) Fiber preparation: The liquid mixture is continuously flowed into the high-speed rotating centrifugal roller, and the liquid mixture is condensed into silky fibers under the action of centrifugal throwing and air cooling. The fiber filaments are collected and formed under the action of the blast, and the (1) raw material components are calculated by weight percentage: 55-65% of blast furnace slag, 12-18% of basalt, 5%-7% of fly ash, 2% of magnesium oxide %‑3%, calcium oxide 2%, wollastonite 15%‑20%.